1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches 4 * 5 * Copyright (c) 2014 Samsung Electronics Co., Ltd 6 * Author: Chanwoo Choi <cw00.choi@samsung.com> 7 */ 8 9 #include <linux/err.h> 10 #include <linux/i2c.h> 11 #include <linux/interrupt.h> 12 #include <linux/irqdomain.h> 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/platform_device.h> 16 #include <linux/regmap.h> 17 #include <linux/slab.h> 18 #include <linux/extcon-provider.h> 19 20 #include "extcon-sm5502.h" 21 22 #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ 23 24 struct muic_irq { 25 unsigned int irq; 26 const char *name; 27 unsigned int virq; 28 }; 29 30 struct reg_data { 31 u8 reg; 32 unsigned int val; 33 bool invert; 34 }; 35 36 struct sm5502_muic_info { 37 struct device *dev; 38 struct extcon_dev *edev; 39 40 struct i2c_client *i2c; 41 struct regmap *regmap; 42 43 struct regmap_irq_chip_data *irq_data; 44 struct muic_irq *muic_irqs; 45 unsigned int num_muic_irqs; 46 int irq; 47 bool irq_attach; 48 bool irq_detach; 49 struct work_struct irq_work; 50 51 struct reg_data *reg_data; 52 unsigned int num_reg_data; 53 54 struct mutex mutex; 55 56 /* 57 * Use delayed workqueue to detect cable state and then 58 * notify cable state to notifiee/platform through uevent. 59 * After completing the booting of platform, the extcon provider 60 * driver should notify cable state to upper layer. 61 */ 62 struct delayed_work wq_detcable; 63 }; 64 65 /* Default value of SM5502 register to bring up MUIC device. */ 66 static struct reg_data sm5502_reg_data[] = { 67 { 68 .reg = SM5502_REG_CONTROL, 69 .val = SM5502_REG_CONTROL_MASK_INT_MASK, 70 .invert = false, 71 }, { 72 .reg = SM5502_REG_INTMASK1, 73 .val = SM5502_REG_INTM1_KP_MASK 74 | SM5502_REG_INTM1_LKP_MASK 75 | SM5502_REG_INTM1_LKR_MASK, 76 .invert = true, 77 }, { 78 .reg = SM5502_REG_INTMASK2, 79 .val = SM5502_REG_INTM2_VBUS_DET_MASK 80 | SM5502_REG_INTM2_REV_ACCE_MASK 81 | SM5502_REG_INTM2_ADC_CHG_MASK 82 | SM5502_REG_INTM2_STUCK_KEY_MASK 83 | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK 84 | SM5502_REG_INTM2_MHL_MASK, 85 .invert = true, 86 }, 87 { } 88 }; 89 90 /* List of detectable cables */ 91 static const unsigned int sm5502_extcon_cable[] = { 92 EXTCON_USB, 93 EXTCON_USB_HOST, 94 EXTCON_CHG_USB_SDP, 95 EXTCON_CHG_USB_DCP, 96 EXTCON_NONE, 97 }; 98 99 /* Define supported accessory type */ 100 enum sm5502_muic_acc_type { 101 SM5502_MUIC_ADC_GROUND = 0x0, 102 SM5502_MUIC_ADC_SEND_END_BUTTON, 103 SM5502_MUIC_ADC_REMOTE_S1_BUTTON, 104 SM5502_MUIC_ADC_REMOTE_S2_BUTTON, 105 SM5502_MUIC_ADC_REMOTE_S3_BUTTON, 106 SM5502_MUIC_ADC_REMOTE_S4_BUTTON, 107 SM5502_MUIC_ADC_REMOTE_S5_BUTTON, 108 SM5502_MUIC_ADC_REMOTE_S6_BUTTON, 109 SM5502_MUIC_ADC_REMOTE_S7_BUTTON, 110 SM5502_MUIC_ADC_REMOTE_S8_BUTTON, 111 SM5502_MUIC_ADC_REMOTE_S9_BUTTON, 112 SM5502_MUIC_ADC_REMOTE_S10_BUTTON, 113 SM5502_MUIC_ADC_REMOTE_S11_BUTTON, 114 SM5502_MUIC_ADC_REMOTE_S12_BUTTON, 115 SM5502_MUIC_ADC_RESERVED_ACC_1, 116 SM5502_MUIC_ADC_RESERVED_ACC_2, 117 SM5502_MUIC_ADC_RESERVED_ACC_3, 118 SM5502_MUIC_ADC_RESERVED_ACC_4, 119 SM5502_MUIC_ADC_RESERVED_ACC_5, 120 SM5502_MUIC_ADC_AUDIO_TYPE2, 121 SM5502_MUIC_ADC_PHONE_POWERED_DEV, 122 SM5502_MUIC_ADC_TTY_CONVERTER, 123 SM5502_MUIC_ADC_UART_CABLE, 124 SM5502_MUIC_ADC_TYPE1_CHARGER, 125 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, 126 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, 127 SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE, 128 SM5502_MUIC_ADC_TYPE2_CHARGER, 129 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, 130 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, 131 SM5502_MUIC_ADC_AUDIO_TYPE1, 132 SM5502_MUIC_ADC_OPEN = 0x1f, 133 134 /* 135 * The below accessories have same ADC value (0x1f or 0x1e). 136 * So, Device type1 is used to separate specific accessory. 137 */ 138 /* |---------|--ADC| */ 139 /* | [7:5]|[4:0]| */ 140 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */ 141 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */ 142 /* |Dev Type1|--ADC| */ 143 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */ 144 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */ 145 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */ 146 }; 147 148 /* List of supported interrupt for SM5502 */ 149 static struct muic_irq sm5502_muic_irqs[] = { 150 { SM5502_IRQ_INT1_ATTACH, "muic-attach" }, 151 { SM5502_IRQ_INT1_DETACH, "muic-detach" }, 152 { SM5502_IRQ_INT1_KP, "muic-kp" }, 153 { SM5502_IRQ_INT1_LKP, "muic-lkp" }, 154 { SM5502_IRQ_INT1_LKR, "muic-lkr" }, 155 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, 156 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" }, 157 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" }, 158 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" }, 159 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" }, 160 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" }, 161 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" }, 162 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" }, 163 { SM5502_IRQ_INT2_MHL, "muic-mhl" }, 164 }; 165 166 /* Define interrupt list of SM5502 to register regmap_irq */ 167 static const struct regmap_irq sm5502_irqs[] = { 168 /* INT1 interrupts */ 169 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, }, 170 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, }, 171 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, }, 172 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, }, 173 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, }, 174 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, }, 175 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, }, 176 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, }, 177 178 /* INT2 interrupts */ 179 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,}, 180 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, }, 181 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, }, 182 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, }, 183 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, }, 184 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, }, 185 }; 186 187 static const struct regmap_irq_chip sm5502_muic_irq_chip = { 188 .name = "sm5502", 189 .status_base = SM5502_REG_INT1, 190 .mask_base = SM5502_REG_INTMASK1, 191 .mask_invert = false, 192 .num_regs = 2, 193 .irqs = sm5502_irqs, 194 .num_irqs = ARRAY_SIZE(sm5502_irqs), 195 }; 196 197 /* Define regmap configuration of SM5502 for I2C communication */ 198 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg) 199 { 200 switch (reg) { 201 case SM5502_REG_INTMASK1: 202 case SM5502_REG_INTMASK2: 203 return true; 204 default: 205 break; 206 } 207 return false; 208 } 209 210 static const struct regmap_config sm5502_muic_regmap_config = { 211 .reg_bits = 8, 212 .val_bits = 8, 213 .volatile_reg = sm5502_muic_volatile_reg, 214 .max_register = SM5502_REG_END, 215 }; 216 217 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ 218 static int sm5502_muic_set_path(struct sm5502_muic_info *info, 219 unsigned int con_sw, unsigned int vbus_sw, 220 bool attached) 221 { 222 int ret; 223 224 if (!attached) { 225 con_sw = DM_DP_SWITCH_OPEN; 226 vbus_sw = VBUSIN_SWITCH_OPEN; 227 } 228 229 switch (con_sw) { 230 case DM_DP_SWITCH_OPEN: 231 case DM_DP_SWITCH_USB: 232 case DM_DP_SWITCH_AUDIO: 233 case DM_DP_SWITCH_UART: 234 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, 235 SM5502_REG_MANUAL_SW1_DP_MASK | 236 SM5502_REG_MANUAL_SW1_DM_MASK, 237 con_sw); 238 if (ret < 0) { 239 dev_err(info->dev, 240 "cannot update DM_CON/DP_CON switch\n"); 241 return ret; 242 } 243 break; 244 default: 245 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", 246 con_sw); 247 return -EINVAL; 248 }; 249 250 switch (vbus_sw) { 251 case VBUSIN_SWITCH_OPEN: 252 case VBUSIN_SWITCH_VBUSOUT: 253 case VBUSIN_SWITCH_MIC: 254 case VBUSIN_SWITCH_VBUSOUT_WITH_USB: 255 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, 256 SM5502_REG_MANUAL_SW1_VBUSIN_MASK, 257 vbus_sw); 258 if (ret < 0) { 259 dev_err(info->dev, 260 "cannot update VBUSIN switch\n"); 261 return ret; 262 } 263 break; 264 default: 265 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw); 266 return -EINVAL; 267 }; 268 269 return 0; 270 } 271 272 /* Return cable type of attached or detached accessories */ 273 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info) 274 { 275 unsigned int cable_type = -1, adc, dev_type1; 276 int ret; 277 278 /* Read ADC value according to external cable or button */ 279 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc); 280 if (ret) { 281 dev_err(info->dev, "failed to read ADC register\n"); 282 return ret; 283 } 284 285 /* 286 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't 287 * connected with to MUIC device. 288 */ 289 cable_type = adc & SM5502_REG_ADC_MASK; 290 if (cable_type == SM5502_MUIC_ADC_GROUND) 291 return SM5502_MUIC_ADC_GROUND; 292 293 switch (cable_type) { 294 case SM5502_MUIC_ADC_GROUND: 295 case SM5502_MUIC_ADC_SEND_END_BUTTON: 296 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON: 297 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON: 298 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON: 299 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON: 300 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON: 301 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON: 302 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON: 303 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON: 304 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON: 305 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON: 306 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON: 307 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON: 308 case SM5502_MUIC_ADC_RESERVED_ACC_1: 309 case SM5502_MUIC_ADC_RESERVED_ACC_2: 310 case SM5502_MUIC_ADC_RESERVED_ACC_3: 311 case SM5502_MUIC_ADC_RESERVED_ACC_4: 312 case SM5502_MUIC_ADC_RESERVED_ACC_5: 313 case SM5502_MUIC_ADC_AUDIO_TYPE2: 314 case SM5502_MUIC_ADC_PHONE_POWERED_DEV: 315 case SM5502_MUIC_ADC_TTY_CONVERTER: 316 case SM5502_MUIC_ADC_UART_CABLE: 317 case SM5502_MUIC_ADC_TYPE1_CHARGER: 318 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: 319 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: 320 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE: 321 case SM5502_MUIC_ADC_TYPE2_CHARGER: 322 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: 323 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: 324 break; 325 case SM5502_MUIC_ADC_AUDIO_TYPE1: 326 /* 327 * Check whether cable type is 328 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE 329 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END 330 * by using Button event. 331 */ 332 break; 333 case SM5502_MUIC_ADC_OPEN: 334 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1, 335 &dev_type1); 336 if (ret) { 337 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n"); 338 return ret; 339 } 340 341 switch (dev_type1) { 342 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK: 343 cable_type = SM5502_MUIC_ADC_OPEN_USB; 344 break; 345 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK: 346 cable_type = SM5502_MUIC_ADC_OPEN_TA; 347 break; 348 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK: 349 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG; 350 break; 351 default: 352 dev_dbg(info->dev, 353 "cannot identify the cable type: adc(0x%x)\n", 354 adc); 355 return -EINVAL; 356 }; 357 break; 358 default: 359 dev_err(info->dev, 360 "failed to identify the cable type: adc(0x%x)\n", adc); 361 return -EINVAL; 362 }; 363 364 return cable_type; 365 } 366 367 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, 368 bool attached) 369 { 370 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND; 371 unsigned int cable_type = SM5502_MUIC_ADC_GROUND; 372 unsigned int con_sw = DM_DP_SWITCH_OPEN; 373 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN; 374 unsigned int id; 375 int ret; 376 377 /* Get the type of attached or detached cable */ 378 if (attached) 379 cable_type = sm5502_muic_get_cable_type(info); 380 else 381 cable_type = prev_cable_type; 382 prev_cable_type = cable_type; 383 384 switch (cable_type) { 385 case SM5502_MUIC_ADC_OPEN_USB: 386 id = EXTCON_USB; 387 con_sw = DM_DP_SWITCH_USB; 388 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB; 389 break; 390 case SM5502_MUIC_ADC_OPEN_TA: 391 id = EXTCON_CHG_USB_DCP; 392 con_sw = DM_DP_SWITCH_OPEN; 393 vbus_sw = VBUSIN_SWITCH_VBUSOUT; 394 break; 395 case SM5502_MUIC_ADC_OPEN_USB_OTG: 396 id = EXTCON_USB_HOST; 397 con_sw = DM_DP_SWITCH_USB; 398 vbus_sw = VBUSIN_SWITCH_OPEN; 399 break; 400 default: 401 dev_dbg(info->dev, 402 "cannot handle this cable_type (0x%x)\n", cable_type); 403 return 0; 404 }; 405 406 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */ 407 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached); 408 if (ret < 0) 409 return ret; 410 411 /* Change the state of external accessory */ 412 extcon_set_state_sync(info->edev, id, attached); 413 if (id == EXTCON_USB) 414 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 415 attached); 416 417 return 0; 418 } 419 420 static void sm5502_muic_irq_work(struct work_struct *work) 421 { 422 struct sm5502_muic_info *info = container_of(work, 423 struct sm5502_muic_info, irq_work); 424 int ret = 0; 425 426 if (!info->edev) 427 return; 428 429 mutex_lock(&info->mutex); 430 431 /* Detect attached or detached cables */ 432 if (info->irq_attach) { 433 ret = sm5502_muic_cable_handler(info, true); 434 info->irq_attach = false; 435 } 436 if (info->irq_detach) { 437 ret = sm5502_muic_cable_handler(info, false); 438 info->irq_detach = false; 439 } 440 441 if (ret < 0) 442 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 443 444 mutex_unlock(&info->mutex); 445 } 446 447 /* 448 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0. 449 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type. 450 */ 451 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type) 452 { 453 switch (irq_type) { 454 case SM5502_IRQ_INT1_ATTACH: 455 info->irq_attach = true; 456 break; 457 case SM5502_IRQ_INT1_DETACH: 458 info->irq_detach = true; 459 break; 460 case SM5502_IRQ_INT1_KP: 461 case SM5502_IRQ_INT1_LKP: 462 case SM5502_IRQ_INT1_LKR: 463 case SM5502_IRQ_INT1_OVP_EVENT: 464 case SM5502_IRQ_INT1_OCP_EVENT: 465 case SM5502_IRQ_INT1_OVP_OCP_DIS: 466 case SM5502_IRQ_INT2_VBUS_DET: 467 case SM5502_IRQ_INT2_REV_ACCE: 468 case SM5502_IRQ_INT2_ADC_CHG: 469 case SM5502_IRQ_INT2_STUCK_KEY: 470 case SM5502_IRQ_INT2_STUCK_KEY_RCV: 471 case SM5502_IRQ_INT2_MHL: 472 default: 473 break; 474 } 475 476 return 0; 477 } 478 479 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data) 480 { 481 struct sm5502_muic_info *info = data; 482 int i, irq_type = -1, ret; 483 484 for (i = 0; i < info->num_muic_irqs; i++) 485 if (irq == info->muic_irqs[i].virq) 486 irq_type = info->muic_irqs[i].irq; 487 488 ret = sm5502_parse_irq(info, irq_type); 489 if (ret < 0) { 490 dev_warn(info->dev, "cannot handle is interrupt:%d\n", 491 irq_type); 492 return IRQ_HANDLED; 493 } 494 schedule_work(&info->irq_work); 495 496 return IRQ_HANDLED; 497 } 498 499 static void sm5502_muic_detect_cable_wq(struct work_struct *work) 500 { 501 struct sm5502_muic_info *info = container_of(to_delayed_work(work), 502 struct sm5502_muic_info, wq_detcable); 503 int ret; 504 505 /* Notify the state of connector cable or not */ 506 ret = sm5502_muic_cable_handler(info, true); 507 if (ret < 0) 508 dev_warn(info->dev, "failed to detect cable state\n"); 509 } 510 511 static void sm5502_init_dev_type(struct sm5502_muic_info *info) 512 { 513 unsigned int reg_data, vendor_id, version_id; 514 int i, ret; 515 516 /* To test I2C, Print version_id and vendor_id of SM5502 */ 517 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data); 518 if (ret) { 519 dev_err(info->dev, 520 "failed to read DEVICE_ID register: %d\n", ret); 521 return; 522 } 523 524 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >> 525 SM5502_REG_DEVICE_ID_VENDOR_SHIFT); 526 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >> 527 SM5502_REG_DEVICE_ID_VERSION_SHIFT); 528 529 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", 530 version_id, vendor_id); 531 532 /* Initiazle the register of SM5502 device to bring-up */ 533 for (i = 0; i < info->num_reg_data; i++) { 534 unsigned int val = 0; 535 536 if (!info->reg_data[i].invert) 537 val |= ~info->reg_data[i].val; 538 else 539 val = info->reg_data[i].val; 540 regmap_write(info->regmap, info->reg_data[i].reg, val); 541 } 542 } 543 544 static int sm5022_muic_i2c_probe(struct i2c_client *i2c, 545 const struct i2c_device_id *id) 546 { 547 struct device_node *np = i2c->dev.of_node; 548 struct sm5502_muic_info *info; 549 int i, ret, irq_flags; 550 551 if (!np) 552 return -EINVAL; 553 554 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); 555 if (!info) 556 return -ENOMEM; 557 i2c_set_clientdata(i2c, info); 558 559 info->dev = &i2c->dev; 560 info->i2c = i2c; 561 info->irq = i2c->irq; 562 info->muic_irqs = sm5502_muic_irqs; 563 info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs); 564 info->reg_data = sm5502_reg_data; 565 info->num_reg_data = ARRAY_SIZE(sm5502_reg_data); 566 567 mutex_init(&info->mutex); 568 569 INIT_WORK(&info->irq_work, sm5502_muic_irq_work); 570 571 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config); 572 if (IS_ERR(info->regmap)) { 573 ret = PTR_ERR(info->regmap); 574 dev_err(info->dev, "failed to allocate register map: %d\n", 575 ret); 576 return ret; 577 } 578 579 /* Support irq domain for SM5502 MUIC device */ 580 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; 581 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, 582 &sm5502_muic_irq_chip, &info->irq_data); 583 if (ret != 0) { 584 dev_err(info->dev, "failed to request IRQ %d: %d\n", 585 info->irq, ret); 586 return ret; 587 } 588 589 for (i = 0; i < info->num_muic_irqs; i++) { 590 struct muic_irq *muic_irq = &info->muic_irqs[i]; 591 int virq = 0; 592 593 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); 594 if (virq <= 0) 595 return -EINVAL; 596 muic_irq->virq = virq; 597 598 ret = devm_request_threaded_irq(info->dev, virq, NULL, 599 sm5502_muic_irq_handler, 600 IRQF_NO_SUSPEND | IRQF_ONESHOT, 601 muic_irq->name, info); 602 if (ret) { 603 dev_err(info->dev, 604 "failed: irq request (IRQ: %d, error :%d)\n", 605 muic_irq->irq, ret); 606 return ret; 607 } 608 } 609 610 /* Allocate extcon device */ 611 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable); 612 if (IS_ERR(info->edev)) { 613 dev_err(info->dev, "failed to allocate memory for extcon\n"); 614 return -ENOMEM; 615 } 616 617 /* Register extcon device */ 618 ret = devm_extcon_dev_register(info->dev, info->edev); 619 if (ret) { 620 dev_err(info->dev, "failed to register extcon device\n"); 621 return ret; 622 } 623 624 /* 625 * Detect accessory after completing the initialization of platform 626 * 627 * - Use delayed workqueue to detect cable state and then 628 * notify cable state to notifiee/platform through uevent. 629 * After completing the booting of platform, the extcon provider 630 * driver should notify cable state to upper layer. 631 */ 632 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq); 633 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 634 msecs_to_jiffies(DELAY_MS_DEFAULT)); 635 636 /* Initialize SM5502 device and print vendor id and version id */ 637 sm5502_init_dev_type(info); 638 639 return 0; 640 } 641 642 static int sm5502_muic_i2c_remove(struct i2c_client *i2c) 643 { 644 struct sm5502_muic_info *info = i2c_get_clientdata(i2c); 645 646 regmap_del_irq_chip(info->irq, info->irq_data); 647 648 return 0; 649 } 650 651 static const struct of_device_id sm5502_dt_match[] = { 652 { .compatible = "siliconmitus,sm5502-muic" }, 653 { }, 654 }; 655 MODULE_DEVICE_TABLE(of, sm5502_dt_match); 656 657 #ifdef CONFIG_PM_SLEEP 658 static int sm5502_muic_suspend(struct device *dev) 659 { 660 struct i2c_client *i2c = to_i2c_client(dev); 661 struct sm5502_muic_info *info = i2c_get_clientdata(i2c); 662 663 enable_irq_wake(info->irq); 664 665 return 0; 666 } 667 668 static int sm5502_muic_resume(struct device *dev) 669 { 670 struct i2c_client *i2c = to_i2c_client(dev); 671 struct sm5502_muic_info *info = i2c_get_clientdata(i2c); 672 673 disable_irq_wake(info->irq); 674 675 return 0; 676 } 677 #endif 678 679 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops, 680 sm5502_muic_suspend, sm5502_muic_resume); 681 682 static const struct i2c_device_id sm5502_i2c_id[] = { 683 { "sm5502", TYPE_SM5502 }, 684 { } 685 }; 686 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id); 687 688 static struct i2c_driver sm5502_muic_i2c_driver = { 689 .driver = { 690 .name = "sm5502", 691 .pm = &sm5502_muic_pm_ops, 692 .of_match_table = sm5502_dt_match, 693 }, 694 .probe = sm5022_muic_i2c_probe, 695 .remove = sm5502_muic_i2c_remove, 696 .id_table = sm5502_i2c_id, 697 }; 698 699 static int __init sm5502_muic_i2c_init(void) 700 { 701 return i2c_add_driver(&sm5502_muic_i2c_driver); 702 } 703 subsys_initcall(sm5502_muic_i2c_init); 704 705 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver"); 706 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 707 MODULE_LICENSE("GPL"); 708